This is only barely anomalous. What you have so far is good, I quite like it actually, but you need to go into more detail about what makes this of serious interest for the Foundation. Right now it seems like throwing it into a box would be a better solution than talking to the guy.

Ask yourself this: Why would the foundation want to learn about this alternate dimension? And further, how can you use that information to make this really interesting?

One quick suggestion to add to those of Doctor Cimmerian (with whom I am again in agreement). Instead of describing the telephone conversations, create a log. It will allow you to create a more unique tone (the passive, objective voice of SCP writing can limit the range of effects you can produce) and hopefully to create the mystery, intrigue or other interesting effect you'd like to give to the reader.